Printing apparatus



J. GONDEK.

PRINTING APPARATUS.

APPLICAHON FILED SEPT. 1. I917.

1,347,505 Patented July 27, 1920.

2 SHEETS-SHEET I.

J. GONDEK.

PRINTING APPARATUS.

APPUCATION FILED SEPT. 1. m7. 7 1,347,505, Patented July 27, 1920.

2 SHEETS-SHEET 2.

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To all whom it may concern: V

Be it knownthat I Joms GONDEK, a citizen of-the'United tates, re'siding at St. Paul, in the county 'of Ramsey and State of Minnesota, have invented certain new and useful. Improvements in Pr nt ng Apparatus,-of whiol1 the following isa specification.

Mymvention relates to an improved apparatus for printing by which inequalities in the printing faces of the type are com pensated'for, thus making an evenness in the printing, operation not possiblewith' the ordinary apparatus and methods.

The object of my'invention is to provide an apparatus for all grades of commercial printing doneon cylinder type press pensing with the hand make ready.

In carry ng out my invention, I employ a composition covering or blanket for the first transfer cylinder, "13, which IQCQlYS an im )ression from the type. This cover-- ing is built up as follows: a heavy layer of specially pre )ared soft, yielding printers roller materia 3. ()n thiS in turn, is'cast a fine layer of specially prepured hard and perfectly smooth material 3, as celluloid, which receives an impression from the type and a printing cylinder 0 to'which this impression is transferred from; the first cylinder, the impression being-transferred to the paper. from the second cylinder in the accompanying drawing forming part of this specification. V

Figure 1 is an and elevation of a printing press embodying my features 'of invention,

Fig. 2 is a topview of a portion of the bed motion,

Fig. 3 is a vertical section through the bed motion,

Fig. 4 is a section through the printing and transfer c linders,

Fig. 5 is a cetailed view of an actuating gear for the bed motion,

Fig. 6 is a side elevation of a printing press embodying my features of invention, and

Fig. 7 is a side elevation of the bed motion.

Referring to the drawings, A represents the frame work of a printing press suitably supporting a slidable type bed 2. Journaled above the type bed is a horizontal cylinder B to receive the printing impression from the type in the type bed. A cyl:

'. Specification of Letters Patent.

tact with the cylinder disinder C journaled alon side of and in con T3 to receive the impression therefrom and constitute thetransfer or printin cylinder and a feed cylinder D is journale along side of and in contact with the 'printin'gi cylinder C. The impression receiving cy nder B is provided with a suitable composition or equivalent yielding covering 3 to" receive the printing impression and equalize the same and the cylinder C is formed with a suitable covering 4 to constitute a printing surface. The cylinders B, C and D are operated from the driving shaft E through the medium of the gear ing li.

he driving shaft 'E may be provided with a driving pulley 6 to be operated from a suitable sourceof power not shown.

The type bed-is adapted to 'be reciprocated by the following described mechanism:

Projecting downwardly from the type bed is 'a'frame F. Having central pivotal support 7' in the frame F is a rack frame 8, said framefSsupq'aorting from its upper end a downwardly directed rackbar 9 and from its lower end an upwardly'directed rack bar 10. Between the rack bars 9 and 10 is positioned a gear 11 supported upon an inner end of a shaft 12, said shaft being journaled in the frame work and at its outer end having drivin connection 13 with the driving shaft E. in the operation of the machine the tilting of the frame 8 alternately brings the racks 9 and 10 into engagement with the gear 11 to oppositely reciprocate the type be The frame 8 is tilted upon its pivot by means of a lever arm 14 having fulcrum support 15 in the base of the machine, the upper end of said lever arm having operative enga ement with a lug 16 projecting downwarc from the frame 8. The lever arm 14 has link connection 17 with a second lever arm' 18 having fulcrum support 19 in thebase of the machine. The free end of the lever arm 18 is engaged by a cam wheel 20 carried by a. horizontal shaft 21 journaled in the machine frame-work. The shaft 21 is operatively connected by the train of gearing 13 and 22 with the driving Patented July 2'7, 1920.

Application filed September 1, 1911. Serial No. 183,303.

said arms having pivotal support 24 upon the rack frame 8. The said arms at their inner ends have toothed engagement 25 so that the turning of one arm will turn the other. Each arm at its outer end carries an outwardly projecting pin 26. The gear 11 as shown in Fig. 5 is formed upon one side and adjacent to its outer edge with a cam 27 adapted to engage the pin 26 of one of the bars 23 or 23, as the gear passes beyond the rack to continue movement of the type bed.. 'lhe bar 23 or the bar 23, as the case may-be, is'turned to bring its pin '26 into the path of the cam 27 through the medium of an arm 28 carried by the arm 28 and projecting rearwardly therefrom. The free end of the arm 28 carries a roller 29 travelin in connection with a guide 30 supported by the frame work of the machine. As'the roller 29 travels over the ends of the guide 30 the arms 23 and 23 will thereby be turned to lower the )ins 26 into the pathway of the cam 27. 'lhe engage'ment of the cam 27 with one of the pins '26 will swing its supportingarm in the are of a circle as shown in Fig. 6,shovi'ng" the type bed .to the endof itsmovement, and at the same time slowingup the movenient so as not to make too abrupt a stop-.7

Ordinarily in carryin' out my invention I provide the transfer 'cy inder, -B, with a suitablev covering, 3, of a heayy layer of soft yielding pri'ntefis roller material; This I in turn iscovered with a fine layer of hard and perfectly smooth material 3', as celluloid to receive the impression from the type and provide the transfer or printing cylinany desired manner to al'lowthe return of the type bed, as by means of the eccentric mechanism 31. p i I claim: 1; Ina printing apparatus ofthe class described, a transfercylinder, a yielding composition covering therefor, and a relatively. hard sheet surfacing for said covering,

2. In a printing ap aratus ot the class described, atrun'sfer cy inder having a yielding composition facing, a relatively hard non-ink absorbing covering for said facing and a transfer cylinder arranged in cooperation with said transfer cylinder.

3. In a printing'apparatus of the class described, a transfer cylinder, a yielding composition facing therefor, a relatively hard, thin and smooth surfaced covering .for said facing, andaltransfer cylinder arran ed 1n cooperation W1th said transfer cylinde'ii.

The impression cylinder will be raised in ture in presence of two witnesses.

JOH N GONDEK.

Witnesses:

RI A. Freeman, FLORENCE WVrnKLnR. 

